<template>
  <div>
    <div class="app"></div>
    <router-view></router-view>
  </div>
</template>

<style>
*{
  margin:0;
  padding:0;
}
.app{
  position: absolute;
  left:0;
  right:0;
  bottom:0;
  top:0;
  background: blue;
  -webkit-app-region: drag;
}
</style>